Natural Tanzanite Stone 22.00 Carat (24.18 Ratti) – Certified Original Gemstone

Natural Tanzanite Stone – 22.00 Carat (24.18 Ratti)

This Natural Tanzanite weighs exactly 22.00 Carats (24.18 Ratti). Sourced exclusively from the foothills of Mount Kilimanjaro in the Merelani Hills of Manyara, Tanzania and precision-cut into an elegant Oval Mixed Cut, this rare Earth-mined gemstone displays an enchanting velvety violet-blue hue with mesmerizing optical pleochroism and high transparent clarity.

Geological Provenance & Physical Constants: Tanzanite is a gemological variety of the mineral Zoisite (Calcium Aluminum Silicate Hydroxide, Ca₂Al₃(SiO₄)₃(OH)) colored by trace vanadium ions, crystallizing in the orthorhombic system. Found in only a single small mining area approximately 7 km long on Earth, tanzanite is one of the world's most geographically concentrated gemstones. Gemological evaluation verifies a refractive index of 1.691 to 1.700 with biaxial positive character, a specific gravity of 3.35, and a Mohs hardness of 6.0 to 7.0. In accordance with universal industry standards, almost all gem-quality tanzanite undergoes gentle, low-temperature thermal treatment to transform brownish trichroic rough into its signature vibrant violet-blue.

Cultural & Modern Fine Jewelry Context: In 2002, the American Gem Trade Association (AGTA) officially designated Tanzanite as a modern birthstone for December (alongside Turquoise and Blue Topaz)—the first addition made to the official birthstone list since 1912. It also commemorates 24th wedding anniversaries. Customarily mounted in 18K/14K White Gold, Platinum, or Sterling Silver (925 Silver) with protective bezel or prong settings that cushion its edges.

Please Note: Ratna Gems shares these historical, cultural, and gemological details solely for educational awareness. We sell all gemstones strictly on the basis of verified physical authenticity, mineral quality, and accredited laboratory certification, and make no astrological, metaphysical, or curative claims.

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